Answer:
A. land use
Explanation:
One of the problems of ranching in the 1800s was the conflict between farmers and cattlemen due to land use. Farmers wanted to use their lands in order to grow their crops. On the other hand, ranchers needed to cross vast distances with their animals. This was made more difficult if they were not able to cross over land that was being cultivated. Therefore, these two groups often had disagreements over the use of land.
